Ionic Compounds and Their Names

what will be the compound name of the following chemical formula?

NaCl

• sodium chloride

• sodium chlorine

• calcium chloride

• potassium chloride

Answer explanation

Na=sodium !

Cl=chlorine which becomes chloriDe when it forms an ion !

ionic compounds are formed when one or more valence electrons are transferred from______

• a metal atom to a nonmetal atom

• a nonmetal atom to a nonmetal atom

• a metal atom to a metal atom

• a nonmetal atom to a metal atom

Answer explanation

a ionic compound ALWAYS has a METAL and a NONmetal and the METAL always comes first in the equation !

what is the formula of sodium oxide

• NaO2

• Na2O2

• Na2O

Answer explanation

sodium makes a +1 charge and oxygen makes a -2 charge !

to balance the equation you need 2 sodium's for every one oxygen !

that's why the formula is Na2O !

which is the correct name for CaBr2?

• bromine calcium

• calcium bromide

• carbon and bromine

• calcium bromine

Answer explanation

Ca is calcium Br is bromine !

calcium needs 2 bromines to balance it !

bromine becomes bromide in compounds !

what is the correct chemical formula for nitrogen triiodide?

• NOI

• N3I3

• NeI3

• NI3

Answer explanation

Nitrogen means ONE nitrogen atom (N) !

Triiodide means THREE iodine atoms (I3) !

so the formula is NI3 !

what is the formula for tricarbon octahydride?

• Ca3H8

• Ca3O

• C2H8

• C3H8

Answer explanation

Tri= 3 carbon atoms --C3 !

Octa= 8 hydrogen atoms--H8 !

so the formula is C3H8 !

which types of elements become cations?

• all metals

• only transition metals

• nonmetals

• some metals and some nonmetals

Answer explanation

all metals become cations (positive ions) because they lose electrons when they form compounds !

a binary covalent bond exists between

• 1 metal and 1 nonmetal

• any 2 elements

• 2 nonmetals

• 2 metals

Answer explanation

covalent bonds ALWAYS have 2 nonmetals !

what is the correct name for C4H6?

• pentacarbon pentahydride

• tetracarbon hexahydride

• carbon hexahydride

• hexacarbon tetrahydride

Answer explanation

tetracarbon hexahydride means:

4 carbon atoms- C4 !

6 hydrogen atoms-- H6 !

so the formula is C4H6 !

what is the formula of calcium oxide

• CaO

• CaO2

• CO

• Ca2O

Answer explanation

calcium (Ca) has +2 charge, and oxygen has a -2 charge !

to balance you need 1 calcium for 1 oxygen !

so the formula is CaO !